Plastering-machine.



A.- G. HIGGINS.

PLASTERING MACHINE.

APPLICATION FILED JULY 2, 1912.

1,100,565, Patented June 16, 191i wmmssss: INVENTOR 7 26 AGH/pg/ns.

ATTORNEY UNITED STATES OFFICE.

ALBERT c. HIGGINS, or K NsAs CITY, mrssounr, Assrenon or oNE-HALF r RAYMOND M. HAvENs, or KANSAS CITY, MISSOURI.

PLASTERING-MACHIN E.

Specification of Letters Patent.

Application filed July 2, 1912. Serial No. 707,262.

To all whom it may concern:

lie it known that I, Amman G. HIGGINS, a citizen of the United States, residing at Kansas City, in the county of Jackson and State of Missouri, have invented certain new and useful Improvements in Plastering-Machines; and I do declare the followin to be a full, clear, and exact description 0 the invention, such as will enable others skilled in the art to which it ap ertains to make and use the same, reference eing had to the accompanying drawings, and to the letters and figures of reference marked thereon, Wl'llCh form a part of this specification.

My invention relates to trowels for applying cement plaster, or the like, and more particularly to a trowel having a feeding attachment whereby cement, or other plastic compositions, may be mixed and fed onto the surface of the trowel, so that it may be spread upon the surface of a wall.

The principal object of the invention consists in forming a mixing valve integral with a trowel in such a manner that cement plaster will be delivered from a nozzle between the trowel and a wall and be smoothed down by the trowel durin travel of the latter.

Further objects 0 the invention consist in providing suitable valves and adjustments, which will hereinafter be described and are illustrated in the accompanying drawings. wherein Figure l is a perspective View of a trowel constructed according to my invention, showing a mixer, air-tank and water supply. Fig. H is a bottom perspective view of the trowel. Fig. III is a longitudinal section of same. Fig. IV is a sectional view showing a modified form of the surface of the trowel.

Referring more in detail to the parts: 1

designates a mixer of any suitable type,

wherein cement and 'sand may be com. mingled in proper proportions for forming a wall, floor slab, or the like, when mixed with a proper quantity of water. The mixer used in connection with the comprises a hopper 2 at one end and a discharge chute 3 at the opposite end into which material may be fed to the mix ing chamber, and through which it may flow therefrom, the interior of the chamber being equipped with a suitable agitator 4, which may be operated from a. motor (not shown). Located beneath the chute 3, and

outer face with a in trowel 4 adapted for receiving materialtherefrom, isv

a hopper 5, having a pipesection 6 connecting with the outlet of the hopper and extending from opposite-sides thereof. On the end of the pipe section 6 is a conduit 7, preferably comprising a flexible hose, of any desired length, and provided with a nozzle 8 at its outer end. Located within the opposite end of the pipe section is a siphon'jet member 9, comprising a nozzle 10, which is adapted for discharge beneath the hopper and in the direction of the conduit 11 designates an air-storage tank, which may be fed from any source (not shown), and has an outlet pipe 12 provided with branches 13, 14 and 15, the outlet pipe being provided with a valve 16, and each of the above named branches with valves 17, 18 and 19, respectively. The branch 13 is connected to the siphon jet member 9 by a hose 20, so that when the valve 17 is open the jet is fed from the pressure tank.

Located between pressure tank 11 and the nozzle 8 is a water supply member 21, having a siphon 22, one end of which is connected with branch of the pressure tank outlet pipe by a hose 23, the opposite end being connected with a ipe 24 on the nozzle 8 through a pipe 25. he third outlet pipe branch 14 is also connected with nozzle 8 by a hose 27 to serve as a booster for driving material across the trowel.

28 designates the trowel body or serving plate, WhlCh is rigidly secured to a flange 29 on the' nozzle 8 and is provided along its ed gate 30, which may be folded down as own in Fig. II when the trowel is not in use. The nozzle 8 is connected with the rear edge of the serving plate and comprises a conduit 31, through which air from hose 27 is delivered under pressure, beingprovided with an air control valve 32 and with a shoe 33, the latter being adapted to bear against the wall and space the serving late therefrom. The conduit 31 is placed so as to an le slightly downward from the serving plate and is entered near the outlet by a pipe 34 which connects with hose 7 and through which the mixture of sand and cement is delivered into the air blast under pressure. Entering pipe 34: is a tube 35 which is connected with the water supply hose 24,and has a jet member 37 extending a short distance into the mixture pipe, the water supply being con- -is turned forwardly, as shown in Fig. III,

and the trowel placed against a wall. A mixture of sand and cement is then fed through pipe 34, and a proper proportion of water added thereto from the jet 37. This mixture passes into pipe 31 and is impelled therethrough by pressure of the air blast from the siphon jet 9, being finally ejected from the pipe 34 into the conduitSl and then blown against gate 80, where it continues to deposit until the space between the trowel and the wall has been filled. The gate may then be folded back and the trowel moved along the wall, the oncom- 1ng mixture always depositing against the bank just formed, the trowel keeping the outer surface smooth.

It is apparent that with an apparatus of this description the amount of waste cement will be reduced to a minimum.

In Fig. IV I have shown a modified form of the surface of the trowel, which may be used in special work and which may be further modified in the number of different ways without departing from the spirit of the invention.

Having .thus described my invention, what I claim as new therein, and desire to secure by Letters-Patent, is:

1. In a plastering machine, a serving plate, an air nozzle adapted for delivering over said plate, a 'ry material conduit connected with the nozzle, and a liquid conduit having a tip pita'jected into the nozzle, substantially as set forth.

2. In a plastering machine, a serving plate, a nozzle adapted for delivering over the serving plate, means for delivering dry material to the nozzle under presssure, means for delivering liquid to the nozzle under pressure and in the direction of travel of the dry material, and separate means for directim a blast adjacent the exit of the nozzle, fbr the purpose set forth.

3. In a plastering machine, a blast meis adapted to deliver, a nozzle opening into said conduit, means for delivering dry material to saidnozzle, a tube projected into said nozzle, and means for delivering liquid through said tube, whereby the dry material and liquid are united, prior to delivery into the blast medium conduit.

4. In a plastering machine, the combination with a nozzle, of a serving plate carried by the nozzle and over which material is delivered therefrom, and a gate hinged to the side of said serving plate opposite the nozzle, for the purpose set forth.

5. In a plastering machine, a flexible serving plate, a clamp for flexing said serving plate, a hinged ate at one side of said plate, and a nozz e at the opposite side of the plate for feeding material onto said plate and against said gate.

6. In anapparatus of the character described, the combination of a trowel, a serving plate for said trowel, having a hinged gate at one side and a nozzle at the other side for delivering solid and fluid ingredients between said serving plate and a wall, and a shoe on said nozzle to space said serving plate from said wall, for the purpose set forth.

7. In a plastering machine, the combination with dry and fluid material supply receptacles, and an air pressure supply member, of a nozzle connected with the pressure supply member, a conduit leading from the dry material supply receptacle and opening into the nozzle whereby flow of dry material is induced through the conduit, a conduit leading from the fluid material receptacle and dlscharging into the dry material conduit adjacent the nozzle, and means leading from the pressure supply member and discharging into said conduits whereby flow is induced from the receptacles and the materials forced toward the nozzle.

In testimony whereof I aflix my signature in presence of two witnesses.

ALBERT Gr. HIGGINS.

Witnesses IRENE Con, LETA E. COATS. 

